<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>demo-4</title>
</head>
<body>
  <script>
    let second = +prompt(`请输入秒数:`)
    function getTime(t) {
      let h = parseInt(t / 60 / 60 % 24)
      let m = parseInt(t / 60 % 24)
      let s = parseInt(t % 60)
      h = h < 10 ? '0' + h : h
      m = m < 10 ? '0' + m : m
      s = s < 10 ? '0' + s : s    
      return `转换完毕之后是${h}小时${m}分${s}秒`
    }
    document.write(getTime(second))
  </script>
</body>
</html>